Fix warnings in C3js module
Fix warnings in C3js module

fmilano/mitk,fmilano/mitk,MITK/MITK,MITK/MITK,fmilano/mitk,fmilano/mitk,fmilano/mitk,fmilano/mitk,MITK/MITK,MITK/MITK,fmilano/mitk,MITK/MITK,MITK/MITK